Ricoh D017 Service Manual page 482

SBU Black Level Loop
Displays the black level adjustment time for each mode. The black level
4640
adjustment is done twice. The 1st loop decides the reference value for the
2nd loop.
1 Loop Count 1st: Color
2 Loop Count 1st: B/W
3 Loop Count 2nd: Color
4 Loop Count 2nd: B/W
SBU White Level Loop
4641
Displays the white level adjustment time for each mode.
1 Loop Count: Color
2 Loop Count: B/W
SBU Timeout Error
4646*
Use this SP to determine whether the automatic scanner adjustment loop
has exceeded the prescribed number of loops and flagged a timeout.
1 Black Level Adjustment 1
2 Black Level Adjustment 2
3 White Level Adjustment
SBU Error
4647
Displays the result of the SBU connection check.
SM Appendix
1st adjustment
[0 to 20 / 0 / 1 /step]
2nd adjustment
[0 to 20 / 0 / 1 /step]
[0 to 20 / 0 / 1 /step]
0: OK
1: AGC adjustment failure
4-49 D017/D018/D019/D020/D084/D085
System SP Tables-4